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BOLETACEAE
nearly free, whitish to flesh colored, somewhat brownish in age. stipe 2-4 in.
long, y8-% iri- thick, equal or tapering upward, sometimes narrowed at the
base, whitish, more or less washed with rose, bright chrome-yellow at the
base, scabrous-dotted, spores pinkish brown, oblong-ellipsoid, smooth, 10-14
(16) X 3.5-5.5 /x.
Usually singly on the ground in woods. June-Sept.
This species is not common but is one of our most beautiful boletes and is
easily recognized by the rosy pileus and the bright yellow base of the stipe.
LECCINUM SCABRUM (Bull, ex Fr.) S. F. Gray Edible
Figure 330, page 233
PILEUS 2-5 in. broad, convex to plane, minutely velvety to glabrous,
slightly viscid when wet, color variable, usually some shade of brown, from
paUid to tawny brown, grayish brown, or blackish brown, flesh whitish, un-
changing or occasionally becoming shghtly pinkish to grayish, not blackening,
taste mild, tubes depressed at the stipe and free or nearly so, whitish becoming
hght brownish, darkening when bruised, stipe 3-5 in. long, ^2-% ii^- thick,
tapering upward to nearly equal, whitish or grayish, with blackish, scabrous
dots, soHd, sometimes turning blue at the base when cut. spores brown, ellip-
soid-fusiform, smooth, (14) 15-19 (21) X 5-7 /u.
Singly or gregarious on the ground in woods or open places. July-Oct.
This is probably our commonest bolete although Singer has recently
shown that two species have been confused under this name. He has described
the second species as Leccinum oxydabile (Sing.) Sing. The two are very similar
in appearance and can be separated with certainty only by microscopic
characters. If a form is collected in which the flesh turns red when cut it is
probably L. oxydabile. The latter has slightly larger spores and the structure of
the cuticle of the pileus is diff'erent. In L. scabrum the cuticle is composed of
slender, filamentous hyphae but in L. oxydabile there are some much broader
hyphae and chains of short cells.
A whitish form is sometimes found that Singer calls L. scabrum ssp.
niveum (Figure 331, p. 233) but which others have regarded as a good species.
It has smaller spores than the typical form and sometimes has greenish tints
in the pileus. It can be distinguished from the whitish L. albellum (Pk.) Sing, by
the structure of the cuticle which in the latter also has chains of short cells.
Duller-colored specimens of L. aurantiacum may also be mistaken for
L. scabrum, but can be distinguished by their smaller spores and the appendicu-
late margin of their pilei.
LECCINUM SUBGLABRIPES (Peck) Sing. Edible
Figure 324, page 215
pileus 1 14-3 J/2 in. broad, convex to plane, yellowish brown to reddish
brown or chestnut, glabrous, dry, with a shghtly projecting, sterile margin.
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